package com.weiyuwqj.api.util;

import org.apache.commons.lang3.StringUtils;

import java.math.BigDecimal;

/**
 * Copyright 2015-2019 Yunfucloud technology co., Ltd.
 * Created by fuxx on 16/1/27.
 */
public class NumberUtils {

    public static Integer parseInt(String str){
        int val=0;
        try {
            val=Integer.parseInt(StringUtils.trimToEmpty(str));
        }catch (Exception e){

        }
        return val;
    }

    public static Integer parseInt(Object obj){
        if(obj==null) return 0;
        if(obj instanceof Integer
                ||obj instanceof Short||obj instanceof Byte) {
            return (Integer)obj;
        }
        if(obj instanceof Double||obj instanceof Float){
            return  ((Double) obj).intValue();
        }
        if(obj instanceof Long){
            return  ((Long) obj).intValue();
        }
        if(obj instanceof BigDecimal){
            BigDecimal decimal=(BigDecimal)obj;
            return decimal.intValue();
        }
        if(obj instanceof  String){
            return parseInt(obj.toString());
        }
        return 0;
    }

    /**
     * 汉语中数字大写
     */
    private static final String[] CN_UPPER_NUMBER = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
    /**
     * 汉语中货币单位大写，这样的设计类似于占位符
      */
    private static final String[] CN_UPPER_MONETRAY_UNIT = { "分", "角", "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "兆", "拾", "佰", "仟" };
    /**
     * 特殊字符：整
     */
    private static final String CN_FULL = "整";

     /**
      * 金额的精度，默认值为2
      */
    private static final int MONEY_PRECISION = 2;
    /**
    * 特殊字符：零元整
    */
    private static final String CN_ZEOR_FULL = "零元" + CN_FULL;

     /**
      *  把输入的金额转换为汉语中人民币的大写
      *
      * @param numberOfMoney
      *            输入的金额
     * @return 对应的汉语大写
      */
     public static String number2CNMontrayUnit(BigDecimal numberOfMoney) {
        StringBuffer sb = new StringBuffer();
        // -1, 0, or 1 as the value of this BigDecimal is negative, zero, or
        // positive.
        int signum = numberOfMoney.signum();
         // 零元整的情况
        if (signum == 0) {
             return CN_ZEOR_FULL;
            }
         //这里会进行金额的四舍五入
        long number = numberOfMoney.movePointRight(MONEY_PRECISION).setScale(0, 4).abs().longValue();
        // 得到小数点后两位值
        long scale = number % 100;
        int numUnit = 0;
        int numIndex = 0;
        boolean getZero = false;
        // 判断最后两位数，一共有四中情况：00 = 0, 01 = 1, 10, 11
        if (!(scale > 0)) {
            numIndex = 2;
             number = number / 100;
            getZero = true;
            }
        if ((scale > 0) && (!(scale % 10 > 0))) {
             numIndex = 1;
             number = number / 10;
             getZero = true;
            }
        int zeroSize = 0;
        while (true) {
            if (number <= 0) {
                 break;
                }
             // 每次获取到最后一个数
            numUnit = (int) (number % 10);
            if (numUnit > 0) {
                if ((numIndex == 9) && (zeroSize >= 3)) {
                    sb.insert(0, CN_UPPER_MONETRAY_UNIT[6]);
                    }
                if ((numIndex == 13) && (zeroSize >= 3)) {
                    sb.insert(0, CN_UPPER_MONETRAY_UNIT[10]);
                    }
                sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
                sb.insert(0, CN_UPPER_NUMBER[numUnit]);
                getZero = false;
                zeroSize = 0;
             } else {
                    ++zeroSize;
                if (!(getZero)) {
                    sb.insert(0, CN_UPPER_NUMBER[numUnit]);
                    }
                if (numIndex == 2) {
                    if (number > 0) {
                         sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
                        }
                    } else if (((numIndex - 2) % 4 == 0) && (number % 1000 > 0)) {
                        sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
                    }
                getZero = true;
                }
            // 让number每次都去掉最后一个数
            number = number / 10;
             ++numIndex;
            }
        // 输入的数字小数点后两位为"00"的情况，则要在最后追加特殊字符：整
        if (!(scale > 0)) {
            sb.append(CN_FULL);
            }
         return sb.toString();
        }

}
